CN1990169A - Renovation technique of steam turbine rotor shaft fracture - Google Patents
Renovation technique of steam turbine rotor shaft fracture Download PDFInfo
- Publication number
- CN1990169A CN1990169A CN 200510130874 CN200510130874A CN1990169A CN 1990169 A CN1990169 A CN 1990169A CN 200510130874 CN200510130874 CN 200510130874 CN 200510130874 A CN200510130874 A CN 200510130874A CN 1990169 A CN1990169 A CN 1990169A
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- steam turbine
- turbine rotor
- rotor shaft
- renovation technique
- laser melting
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Abstract
The invention discloses a restoring technique of cracked automobile wheel shaft, which comprises the following steps: manufacturing new piece; assembling and connecting new piece; manufacturing entire piece mechanically; proceeding lossless defectoscopic detection and dynamic balance of rotor; fusing to cover the mechanic connection and interface part through laser.
Description
Technical field
The present invention relates to the maintenance and the detection technique of steam turbine rotor shaft fracture, a kind of renovation technique of steam turbine rotor shaft fracture is provided especially.
Background technology
Turbine rotor is the critical component that the kinetic energy of gas is converted to mechanical energy.Turbine rotor generally is made up of parts such as armature spindle, wheel disc, blades, and the accuracy class height of its steam turbine rotor shaft, complex manufacturing technology, production cost height, cycle are long.The process conditions harshness of steam turbine rotor shaft, working speed be from 3000 rev/mins to about 7000 rev/mins, and operating temperature is at 80～300 ℃, even higher, and will reach more than 20 years the service life of turning round continuously.
The blank of steam turbine rotor shaft is generally the high duty alloy steel forgings, because it influences the quality and the life-span of whole rotor, so strict quality requirement is arranged.The manufacturing cost of steam turbine rotor shaft is very high, accounts for 20%～40% of whole rotor manufacturing cost, and the manufacturing cycle is also very long.
Be in operation, the working environment of turbine rotor is very complicated, under high temperature, high rotating speed operating mode, bear vibration and shock loading, if the variable cross-section place of armature spindle is because there are defective in design, processing or material internal, very easily produce the fracture of armature spindle, if make again, all be that user institute is unaffordable from the duration to the cost.Simultaneously because steam turbine provides the equipment of the energy, it is long-term to stop production that to give enterprise even the economy in an area, the loss that people's lives are brought be very huge, therefore, must take certain mode to keep in repair.
The mode of mechanical connection is all adopted in present maintenance.Be subjected to the influence of concrete method of attachment, machining accuracy and mounting process, the total quality that makes armature spindle can not obtain hundred-percent assurance when operation, and the safe operation of rotor is had major hidden danger.
Summary of the invention
The object of the present invention is to provide a kind of renovation technique with high-quality, high safety factor, high-precision steam turbine rotor shaft fracture.
The invention provides a kind of renovation technique of steam turbine rotor shaft fracture, comprise: new part (being generally spindle nose) processing, new part is installed and is connected, whole machining, nondestructive inspection detection and rotor dynamic balancing is characterized in that: it is the laser melting coating at mechanical connection and interface position that described new installation connects.
The renovation technique of steam turbine rotor shaft fracture provided by the invention, the laser melting coating at its interface position can carry out laser melting coating to the technology groove new, that old part processes in advance.
The renovation technique of steam turbine rotor shaft fracture provided by the invention, the technological parameter of the laser melting coating at its interface position can be: the pool size diameter is that 2～5mm, the degree of depth are 0.1～0.2mm, be 0.001～0.1s heat time heating time, and cladding material is the metal powder that adapts with matrix; Guaranteed that so well armature spindle is had only very little hot input quantity, other position has not been had obvious influence, and reliable in quality.
The renovation technique of steam turbine rotor shaft fracture provided by the invention, its mechanical connection are meant the method that interference, screw thread, key or pin connect, to transmit certain axial force or the moment of torsion of rotor.
Advantage of the present invention is: realized additive method in the prior art is difficult for the reparation to steam turbine rotor shaft fracture of realization, the intensity of the steam turbine rotor shaft after the reparation, life-span are all with former identical substantially, and this renovation technique adaptability is strong, easy and simple to handle, mismachining tolerance is little, thermal deformation is little, standardization is strong, the combination property of reparation back steam turbine rotor shaft also obviously is better than other method, has huge value.
Description of drawings
Fig. 1 is the schematic diagram of the steam turbine rotor shaft after repairing.
The specific embodiment
The renovation technique of embodiment 1 steam turbine rotor shaft fracture
Processing step is as follows:
1, failure cause analysis, for the design of new part, the method for attachment and the concrete size at interface position provide foundation:
1.1 Metallographic Analysis to damage location;
1.2 to the rotor material constituent analysis;
1.3 determine the reason of rotor shaft fracture by analysis result.
2, the fraction to fracture redesigns
2.1 select the position of the less cross section of stress as interface;
2.2 according to the axial and radial load that rotor bears, the part mode that is threaded and adds laser melting coating is adopted in decision, and determines the size of core thread size and laser melting coating groove according to load;
2.3 other spot size of mapping fractured part;
2.4 by the mapping consequence devised, to guarantee the reliable installation of union piece.
3, intensity is calculated
3.1 double thread partly carries out strength check;
3.2 strength check is carried out at the interface position to laser melting coating.
4, part processing
4.1 part forges;
4.2 ultrasonic examination;
4.3 machining;
4.4 dimensional gaughing.
5, part is installed: with the part that processes---spindle nose 1 usefulness screw thread position 3 be connected with former armature spindle 4 (as shown in Figure 1).
6, laser melting coating: 2 carry out laser melting coating in the laser melting coating district, and the about 3mm of molten bath diameter, pool depth are about 0.1～0.2mm, and be 0.001～0.1s heat time heating time, and cladding material is the metal powder that adapts with matrix.
7, the whole processing of rotor: recover other spot size.
8, cladding position nondestructive inspection: guarantee inner zero defect.
9, size and form and position tolerance detect, to reach the related requests such as form and position tolerance that satisfy surface smoothness, hardness, dimensional tolerance and rotor through the steam turbine rotor shaft after the above-mentioned repair process:
9.1 the size of all working positions and form and position tolerance detect;
9.2 the whole form and position tolerance of rotor detects.
10, thrust disc is installed.
11, the thrust disc form and position tolerance detects.
12, the whole dynamic balancing of rotor: adopt the method that increases or reduce balancing weight to make rotor satisfy requirement for dynamic balance.
Claims (4)
1, a kind of renovation technique of steam turbine rotor shaft fracture, comprise: new part processing, new part is installed and is connected whole machining, nondestructive inspection detection and rotor dynamic balancing is characterized in that: it is the laser melting coating at mechanical connection and interface position that described new installation connects.
2, according to the renovation technique of the described steam turbine rotor shaft fracture of claim 1, it is characterized in that: the laser melting coating at described interface position is meant, the technology groove new, that old part processes is in advance carried out laser melting coating.
3, according to the renovation technique of claim 1 or 2 described steam turbine rotor shaft fractures, the technological parameter that it is characterized in that the laser melting coating at described interface position is: the pool size diameter is that 2～5mm, the degree of depth are 0.1～0.2mm, be 0.001～0.1s heat time heating time, and cladding material is the metal powder that adapts with matrix.
4, according to the renovation technique of the described steam turbine rotor shaft fracture of one of claim 1～3, it is characterized in that: described mechanical connection is meant the method that interference, screw thread, key or pin connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510130874 CN1990169A (en) | 2005-12-26 | 2005-12-26 | Renovation technique of steam turbine rotor shaft fracture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510130874 CN1990169A (en) | 2005-12-26 | 2005-12-26 | Renovation technique of steam turbine rotor shaft fracture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1990169A true CN1990169A (en) | 2007-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510130874 Pending CN1990169A (en) | 2005-12-26 | 2005-12-26 | Renovation technique of steam turbine rotor shaft fracture |
Country Status (1)
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| CN (1) | CN1990169A (en) |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102773655A (en) * | 2012-07-20 | 2012-11-14 | 哈尔滨汽轮机厂有限责任公司 | Repairing method of steam turbine rotor fir type wheel groove |
| CN103128483A (en) * | 2011-11-28 | 2013-06-05 | 宝山钢铁股份有限公司 | Repair method of fracture shaft |
| CN103464964A (en) * | 2013-09-26 | 2013-12-25 | 常熟市淼泉压缩机配件有限公司 | Repair process of screw rod compressor rotor |
| CN104191155A (en) * | 2014-07-28 | 2014-12-10 | 河南中孚铝合金有限公司 | Technique for rapidly repairing broken gear shaft by using implantation method |
| CN104690484A (en) * | 2013-12-04 | 2015-06-10 | 铜陵市永生机电制造有限责任公司 | Crack and leakage processing method for hydraulic tube of aluminum extruding machine |
| CN105081672A (en) * | 2015-09-17 | 2015-11-25 | 山东钢铁股份有限公司 | Method for repairing fractured transmission shaft |
| CN105420721A (en) * | 2015-10-27 | 2016-03-23 | 新疆汇翔激光科技有限公司 | Repairing method for steam turbine oil pump flywheel shaft through laser cladding |
| CN105458011A (en) * | 2015-11-17 | 2016-04-06 | 益阳紫荆福利铸业有限公司 | Connecting method of cast steel roll neck |
| CN105598632A (en) * | 2016-01-22 | 2016-05-25 | 天津电力机车有限公司 | Method for repairing mandrel of indicator valve of internal combustion locomotive |
| CN107350716A (en) * | 2017-07-14 | 2017-11-17 | 哈尔滨飞机工业集团有限责任公司 | A kind of frock type planar defect restorative procedure |
| CN108202202A (en) * | 2018-01-05 | 2018-06-26 | 沈阳大唐斯普瑞科技有限公司 | Turbine rotor gland sealing gear complex system and method |
| CN108723693A (en) * | 2018-04-23 | 2018-11-02 | 中国第汽车股份有限公司 | 2000 tons of mechanical press high speed axle fracture fast repairing methods |
| CN109865981A (en) * | 2017-12-05 | 2019-06-11 | 上海仪电显示材料有限公司 | The restorative procedure of part of damage |
| CN110170800A (en) * | 2019-06-05 | 2019-08-27 | 刘艺纯 | Bit shank screw thread scrap after reproducing method |
| CN111185714A (en) * | 2020-01-10 | 2020-05-22 | 新兴河北冶金资源有限公司 | Shaft regeneration process |
| CN111482762A (en) * | 2019-10-30 | 2020-08-04 | 国家电投集团黄河上游水电开发有限责任公司 | Main shaft fracture repairing method for kneading machine |
| CN112171177A (en) * | 2020-10-11 | 2021-01-05 | 浙江翰德圣智能再制造技术有限公司 | Remanufacturing method for fractured polypropylene stirring rotor of dryer |
| CN112536570A (en) * | 2020-10-30 | 2021-03-23 | 乳源东阳光磁性材料有限公司 | Worm repairing method and worm assembly |
-
2005
- 2005-12-26 CN CN 200510130874 patent/CN1990169A/en active Pending
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103128483A (en) * | 2011-11-28 | 2013-06-05 | 宝山钢铁股份有限公司 | Repair method of fracture shaft |
| CN102773655A (en) * | 2012-07-20 | 2012-11-14 | 哈尔滨汽轮机厂有限责任公司 | Repairing method of steam turbine rotor fir type wheel groove |
| CN103464964A (en) * | 2013-09-26 | 2013-12-25 | 常熟市淼泉压缩机配件有限公司 | Repair process of screw rod compressor rotor |
| CN104690484A (en) * | 2013-12-04 | 2015-06-10 | 铜陵市永生机电制造有限责任公司 | Crack and leakage processing method for hydraulic tube of aluminum extruding machine |
| CN104191155A (en) * | 2014-07-28 | 2014-12-10 | 河南中孚铝合金有限公司 | Technique for rapidly repairing broken gear shaft by using implantation method |
| CN105081672A (en) * | 2015-09-17 | 2015-11-25 | 山东钢铁股份有限公司 | Method for repairing fractured transmission shaft |
| CN105420721A (en) * | 2015-10-27 | 2016-03-23 | 新疆汇翔激光科技有限公司 | Repairing method for steam turbine oil pump flywheel shaft through laser cladding |
| CN105458011A (en) * | 2015-11-17 | 2016-04-06 | 益阳紫荆福利铸业有限公司 | Connecting method of cast steel roll neck |
| CN105458011B (en) * | 2015-11-17 | 2018-05-25 | 益阳紫荆福利铸业有限公司 | A kind of cast steel roll roll neck connecting method |
| CN105598632B (en) * | 2016-01-22 | 2018-02-13 | 天津电力机车有限公司 | A kind of diesel locomotive indicator valve mandrel restorative procedure |
| CN105598632A (en) * | 2016-01-22 | 2016-05-25 | 天津电力机车有限公司 | Method for repairing mandrel of indicator valve of internal combustion locomotive |
| CN107350716A (en) * | 2017-07-14 | 2017-11-17 | 哈尔滨飞机工业集团有限责任公司 | A kind of frock type planar defect restorative procedure |
| CN109865981A (en) * | 2017-12-05 | 2019-06-11 | 上海仪电显示材料有限公司 | The restorative procedure of part of damage |
| CN108202202A (en) * | 2018-01-05 | 2018-06-26 | 沈阳大唐斯普瑞科技有限公司 | Turbine rotor gland sealing gear complex system and method |
| CN108202202B (en) * | 2018-01-05 | 2020-01-10 | 沈阳大唐斯普瑞科技有限公司 | Steam seal tooth repairing system and method for steam turbine rotor |
| CN108723693A (en) * | 2018-04-23 | 2018-11-02 | 中国第汽车股份有限公司 | 2000 tons of mechanical press high speed axle fracture fast repairing methods |
| CN110170800A (en) * | 2019-06-05 | 2019-08-27 | 刘艺纯 | Bit shank screw thread scrap after reproducing method |
| CN111482762A (en) * | 2019-10-30 | 2020-08-04 | 国家电投集团黄河上游水电开发有限责任公司 | Main shaft fracture repairing method for kneading machine |
| CN111185714A (en) * | 2020-01-10 | 2020-05-22 | 新兴河北冶金资源有限公司 | Shaft regeneration process |
| CN112171177A (en) * | 2020-10-11 | 2021-01-05 | 浙江翰德圣智能再制造技术有限公司 | Remanufacturing method for fractured polypropylene stirring rotor of dryer |
| CN112536570A (en) * | 2020-10-30 | 2021-03-23 | 乳源东阳光磁性材料有限公司 | Worm repairing method and worm assembly |
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